Corrosion Inhibition Mechanism and Performance of Immobilized Lysozyme
摘 要
采用物理吸附方法将溶菌酶固定在MCM-41介孔分子筛上,并与化学缓蚀剂[氨基三亚甲基膦酸(ATMP)与聚天冬氨酸(PASP)]复配用作循环冷却水缓蚀剂。利用电化学法分析复配缓蚀剂的缓蚀机理,并用失重法所测得的复配缓蚀剂缓蚀性能为指标优化复配条件。结果表明:复配缓蚀剂为混合型缓蚀剂,可以同时抑制腐蚀过程的阴极反应与阳极反应,最佳复配方案为固定化溶菌酶投加量0.7 g/L、ATMP质量浓度10 mg/L、PASP质量浓度20 mg/L,缓蚀率可达88.55%,循环冷却水对碳钢腐蚀速率降至0.017 3 mm/a,作用时间为11~13 d。
Abstract
Lysozyme was immobilized on MCM-41 mesoporous molecular sieve by physical adsorption method, and then compounded with chemical inhibitors amino trimethylene phosphonic acid (ATMP) and sodium of polyaspartic acid (PASP) to act as the circulating cooling water inhibitor. Electrochemical methods were used to analyze the inhibition mechanism of the compound inhibitor, and the method of weight loss of was used to analyze the inhibition performance of the compound inhibitor which would be the index of the optimized compound condition. The results showed that the compound inhibitor was a mixed inhibitor, which could inhibit the cathodic reaction and the anodic reaction in the corrosion process at the same time. The optimal compound scheme was as follows, when the adding amount of immobilize lysozyme was 0.7 g/L, ATMP was 10 mg/L and PASP was 20 mg/L, the inhibition rate could be up to 88.55%, the corrosion rate of carbon steel in circulating cooling water would decrease to 0.0173 mm/a, and the action time could be up to 11-13 days.
中图分类号 X505 TQ085 DOI 10.11973/fsyfh-201709012
所属栏目 应用技术
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收稿日期 2016/2/1
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引用该论文: JIANG Guofei,LIU Fang,LI Jiaman,WANG Hongxi,ZHAO Chaocheng,WANG Yongqiang. Corrosion Inhibition Mechanism and Performance of Immobilized Lysozyme[J]. Corrosion & Protection, 2017, 38(9): 715
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参考文献
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【8】PRADEEP K A,NITYANANDA S. Electrochemical investigation on the corrosion of 18% Ni M250 grade maraging steel under welded condition in sulfuric acid medium[J]. Surface Engineering & Applied Electrochemistry,2013,49(3):253-260.
【9】李莉,李学坤,孙平,等. 新型咪唑啉类缓蚀剂的合成和缓蚀性能研究[J]. 化学工程师,2014,28(12):14-17.
【10】张红红,谢彦,杨仲年. 2-羟基-4-甲氧基苯甲醛缩氨基硫脲对碳钢的缓蚀作用[J]. 应用化工,2014,43(11):1973-1976.
【11】刘琳,潘晓娜,张强,等. 噻二唑衍生物分子结构与其缓蚀性能的关系[J]. 化工学报,2014,65(10):4039-4048.
【12】田继强. 钨铝合金在NaCI溶液中的电化学腐蚀行为研究[D]. 青岛:中国海洋大学,2013.
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【14】曹楚南. 腐蚀电化学原理[M]. 第三版. 北京:化学工业出版社,2008:208.
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